visible main form?

hi.

i create a form main and form for login, at the start of the program i will call the login form then if ok enable main form or if cancel exit..

my problem is when i call the form login in class constructor at the start of the program, i only see the login form without the main form. what i want is to see both at the start of the program but login form as modal. how?

tnks

Code:

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int main(...){
  QApplication app(...);
  MainWindow mw;
  mw.show();
  QTimer::singleShot(0, &mw, SLOT(displayLogin());
  return app.exec();
}
 
class MainWindow ... {
...
public slots:
  void displayLogin(){
    LoginDialog dlg(this);
    dlg.exec();
  }
};

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